A low-power high-conversion photochlorination reactor

Abstract

The utility model relates to a low -power consumption high conversion rate photochlorination reactor, the inside upper and lower gap of ware body sets up many sections of light section, sets up ultraviolet lamp device below each section of light section gap, the ultraviolet lamp mounting hole of ultraviolet lamp device is equipped with the connecting flange in the side edge of ware body, the one end of transparent outer tube of ultraviolet lamp device is sealed and inserts in the inside of ware body, the other side of transparent outer tube is open and is encapsulated through mounting seat, the aluminium base plate is vertically connected in the inside cavity of transparent outer tube to mounting seat, the aluminium base plate is connected to a plurality of LED lamp pearl down, one LED lamp pearl in a plurality of LED lamp pearls is located the centre of aluminium base plate, and the rest LED lamp pearl is distributed around the circumference of aluminium base plate centre, the convex mirror is down convex and is connected to the aluminium base plate cover and is installed a plurality of LED lamp pearls, and the aluminium base plate and convex mirror set up in transparent outer tube; mounting seat locking connection is in the connecting flange, and the air inlet and outlet of inside connection transparent outer tube cavity, outside connection heat exchange system are still equipped with on mounting seat. The reactor installation, convenient to use, safe, can effectively avoid by -product, prolongs the life.

Description

Technical Field

[0001] This utility model relates to a chemical production reactor, specifically a low-power, high-conversion photochlorination reactor. Background Technology

[0002] In existing difluorochloroethane chlorination production technologies, photochlorination reactors are typical photocatalytic reactors. They use built-in ultraviolet lamps or ring-shaped external LED lamps for photocatalytic reactions. In practical applications, the surface temperature of the built-in ultraviolet lamps can reach 200-300℃, making the ultraviolet lamp assembly prone to damage. It also leads to high-temperature cracking of difluoroethane and difluorochloroethane, resulting in low reaction selectivity and numerous byproducts. Summary of the Invention

[0003] This invention provides a low-power, high-conversion-rate photochlorination reactor that is easy to install and use, safe, effectively avoids byproducts, and extends service life.

[0004] The technical solution adopted in this utility model is as follows: a low-power, high-conversion-rate photochlorination reactor, comprising a reactor body, with multiple illumination sections arranged in the upper and lower gaps within the reactor body, and an ultraviolet lamp device arranged in the gap below each illumination section. The reactor body has an ultraviolet lamp mounting port with a connecting flange on its side. The ultraviolet lamp device includes a mounting base, an aluminum substrate, LED beads, a convex mirror, and a transparent outer tube. One end of the transparent outer tube is sealed and inserted into the reactor body, while the other end is open and encapsulated by the mounting base. The mounting base is vertically connected to the aluminum substrate facing the inner cavity of the transparent outer tube. Multiple LED beads are connected downwards to the aluminum substrate, with one LED bead located at the center of the aluminum substrate and the remaining LED beads evenly distributed around the center circumference of the aluminum substrate. The convex mirror, facing downwards and upwards, is connected to the aluminum substrate and covers the multiple LED beads. The aluminum substrate and the convex mirror are disposed inside the transparent outer tube. The mounting base is locked to the connecting flange and also has inlet and outlet ports for connecting to the inner cavity of the transparent outer tube and to the heat exchange system.

[0005] Furthermore, the thermal conductivity of the aluminum substrate is ≥200W / (m·K).

[0006] Furthermore, one LED bead located at the center of the aluminum substrate maintains a 0° vertical illumination, while eight LED beads arranged around the circumference are tilted outward at 10-15°, and the LED beads adopt a 24° beam angle.

[0007] Furthermore, the convex mirror is coated with a nanoscale silica diffusion coating.

[0008] Furthermore, the nanoscale silica diffusion coating is surrounded by a high-purity quartz protective layer.

[0009] Furthermore, the transparent outer tube is made of transparent quartz.

[0010] Furthermore, the heat exchange system includes a cooler, which is connected to an air inlet and an air outlet via air ducts.

[0011] Furthermore, the heat exchange system is a nitrogen storage tank, which is connected to the air inlet via a fan and air duct, and the air outlet is connected back to the nitrogen storage tank via an air duct, cooler or heat exchanger.

[0012] Furthermore, a temperature and pressure sensor is installed on the mounting base facing outwards, which is connected to the inner cavity of the transparent outer tube to monitor temperature and pressure.

[0013] The beneficial effects of this invention are as follows: The number of outer LED beads and the circumference diameter are adjusted according to the radius of curvature of the convex mirror to ensure no dead angles in fiber optic coverage. The installation angle of the LED beads must match the curvature of the mirror. Fine-tuning the tilt angle controls the light dispersion direction, reducing localized overbrightness or shadows. Furthermore, the use of a convex mirror further improves the uniformity of ultraviolet distribution within the reactor. A nano-level diffusion coating is applied to the surface of the convex mirror to reduce glare from direct reflection and improve the uniformity of the light field. A high-purity quartz glass plate protective layer on the outer layer enhances the corrosion resistance and high-temperature resistance of the reflector. A slightly higher density of LED beads is set at 0° vertical illumination in the central area of ​​the aluminum substrate to compensate for edge brightness attenuation and avoid uneven brightness caused by overlapping light spots. The substrate of the LED beads is a high thermal conductivity aluminum substrate with a thermal conductivity ≥200W / (m·K). Combined with an external heat exchange system using forced air cooling or nitrogen heat exchange cooling, the operating temperature is maintained at ≤60℃ to prevent overheating or light decay, comprehensively ensuring service life and reaction efficiency while reducing energy consumption and byproducts. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the ultraviolet lamp device of this utility model; Figure 3 for Figure 2 Schematic diagram of LED lamp bead installation.

[0015] In the diagram: 1. Body; 2. Illumination section; 3. UV lamp mounting port; 4. Connecting flange; 5. UV lamp device; 6. Mounting base; 7. Aluminum substrate; 8. LED beads; 9. Convex mirror; 10. Transparent outer tube; 11. Air inlet; 12. Air outlet; 13. Nitrogen storage tank; 14. Fan; 15. Cooler. Detailed Implementation

[0016] The following explanation, in conjunction with the accompanying drawings, will provide further details.

[0017] Figure 1-3As shown: A low-power, high-conversion photochlorination reactor includes a reactor body 1 and an ultraviolet lamp device 5. Multiple illumination sections 2 are arranged with vertical gaps within the reactor body 1. An ultraviolet lamp mounting port 3 with a connecting flange 4 is opened on the side of the reactor body 1. An ultraviolet lamp device 5 is arranged below each illumination section 2. The ultraviolet lamp device includes a mounting base 6, an aluminum substrate 7, LED beads 8, a convex mirror 9, and a transparent outer tube 10. One end of the transparent outer tube 10 is sealed and inserted into the reactor body 1, while the other end of the transparent outer tube 10 is open and sealed through the mounting base 6. Mounting base 6 is vertically connected to aluminum substrate 7 facing the inner cavity of the transparent outer tube. Nine LED beads 8 are connected downwards to aluminum substrate 7, with one LED bead 8 located at the center of aluminum substrate 7 and the remaining eight LED beads 8 evenly distributed around the center circumference of aluminum substrate 7. A convex mirror 9, facing downwards and upwards, is connected to aluminum substrate 7 and covers the LED beads. The aluminum substrate and convex mirror are housed inside the transparent outer tube. Mounting base 6 is locked to connecting flange 4. Mounting base 6 also has inlet and outlet ports 11 and 12, which connect to the inner cavity of the transparent outer tube and to the heat exchange system. Nitrogen storage tank 13 is connected to inlet port 11 via fan 14 and duct, and outlet port 12 is connected back to nitrogen storage tank via duct and cooler 15.

[0018] In this embodiment, the thermal conductivity of the aluminum substrate is ≥200W / (m·K). The convex mirror is coated with a nano-scale silica diffusion coating; a high-purity quartz protective layer is provided outside the nano-scale silica diffusion coating; and a transparent outer tube is made of transparent quartz tube.

[0019] In this embodiment, the cooler can be plant-grown chilled water or replaced with a radiator. Nitrogen can also be replaced with air for heat exchange.

[0020] In this embodiment, an LED bead located at the center of the aluminum substrate is kept at 0° vertical illumination.

[0021] In practical use, the reactor body has an inner diameter of 680mm. 24° beam angle LEDs are selected, with each LED covering a diameter of approximately 130mm (at a distance of 50mm from the mirror). The LEDs are arranged in a 1+8 layered layout: the central LED is vertically installed, and the radius of the outer LEDs is calculated using the formula: R_outer = (mirror diameter / 2) × 0.66 = 150mm × 0.66 ≈ 100mm. The outer eight LEDs are evenly distributed on a 200mm diameter circumference. The central LED maintains 0° vertical illumination, while the outer LEDs are tilted outwards at 10-15°. Trigonometric functions compensate for the edge brightness attenuation caused by curvature. Tilt angle ≈ arctan(mirror depth / radius of curvature) = arctan(75mm / 600mm) ≈ 7° (plus safety redundancy angle). The actual correction uses a 12° tilt angle to avoid dark areas forming at the mirror edge.

Claims

1. A low-power, high-conversion photochlorination reactor, comprising a body, with multiple illumination sections arranged between the upper and lower parts of the body, and an ultraviolet lamp device arranged below each illumination section, characterized in that: The device body has a UV lamp mounting port with a connecting flange on its side. The UV lamp device includes a mounting base, an aluminum substrate, LED beads, a convex mirror, and a transparent outer tube. One end of the transparent outer tube is sealed and inserted into the device body, while the other end is open and encapsulated by the mounting base. The mounting base is vertically connected to the aluminum substrate facing the inner cavity of the transparent outer tube. Multiple LED beads are connected downwards to the aluminum substrate, with one LED bead located at the center of the aluminum substrate and the remaining LED beads evenly distributed around the center circumference of the aluminum substrate. The convex mirror protrudes downwards and upwards, connecting to the aluminum substrate and covering multiple LED beads. The aluminum substrate and the convex mirror are disposed inside the transparent outer tube. The mounting base is locked to the connecting flange and also has inlet and outlet ports for connecting to the inner cavity of the transparent outer tube and to the heat exchange system.

2. The low-power, high-conversion photochlorination reactor according to claim 1, characterized in that: The thermal conductivity of the aluminum substrate is ≥200W / (m·K).

3. A low-power, high-conversion photochlorination reactor according to claim 1 or 2, characterized in that: An LED located at the center of the aluminum substrate is kept at 0° vertical illumination, and eight LEDs are arranged around the circumference and tilted outward at 10-15°. The LEDs are 24° beam angle LEDs.

4. The low-power, high-conversion photochlorination reactor according to claim 1, characterized in that: The convex mirror is coated with a nano-scale silica diffusion coating.

5. The low-power, high-conversion photochlorination reactor according to claim 4, characterized in that: The nanoscale silica diffusion coating is surrounded by a high-purity quartz protective layer.

6. The low-power, high-conversion photochlorination reactor according to claim 1, characterized in that: The transparent outer tube is made of transparent quartz.

7. The low-power, high-conversion photochlorination reactor according to claim 1, characterized in that: The heat exchange system includes a cooler, which is connected to the air inlet and outlet via air ducts.

8. The low-power, high-conversion photochlorination reactor according to claim 1, characterized in that: The heat exchange system is a nitrogen storage tank. The nitrogen storage tank is connected to the air inlet via a fan and air duct, and the air outlet is connected back to the nitrogen storage tank via an air duct, cooler or heat exchanger.

9. The low-power, high-conversion photochlorination reactor according to claim 1, characterized in that: A temperature and pressure sensor is installed on the mounting base facing outwards, which is connected to the inner cavity of the transparent outer tube to monitor temperature and pressure.

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